Holo-krome 72002 Hex Socket Cap Screw 2-56 Unc Alloy Steel

Product Description

The HOLO-KROME 72002 is a hex socket cap screw designed for high-strength fastening in tight-clearance applications. It features a 2-56 UNC thread size with a 3/16 inch length under head and is fully threaded from bearing surface to tip. The 5/64 inch hex drive accepts a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and reduced galling during installation. It meets ASME B18.3 and ASTM A574 standards, making it suitable for precision mechanical assemblies where dimensional and strength tolerances are critical. Licensed tradespeople and maintenance machinists specify this type of fastener for instrument, tooling, and equipment fabrication work.

This screw is used in light-load, precision fastening applications that require a low-profile socket-drive cap screw in a fine-pitch imperial thread. Typical install scenarios include instrument enclosures, jigs, fixtures, small mechanical subassemblies, and equipment panels where space constraints prevent use of larger fasteners. The black oxide coating provides mild corrosion protection suitable for interior or protected environments. Sold as a single unit with a minimum order quantity of 100 pieces, this fastener is stocked for production and MRO purchasing.

Key Features

• 2-56 UNC thread for fine-pitch imperial fastening in precision assemblies
• Fully threaded body for maximum thread engagement in thin materials
• 5/64 inch hex socket drive for use with standard hex keys
• Alloy steel construction meets ASTM A574 strength requirements
• Black oxide finish provides mild corrosion and galling resistance
• Conforms to ASME B18.3 socket cap screw dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 2-56 UNC fully threaded fastener with a 5/64 inch hex drive.

Installation Notes

Install using a calibrated 5/64 inch hex key or L-wrench; do not use an oversized key, as this can round the socket recess. Confirm mating thread is tapped to 2-56 UNC before installation. For production assemblies, a torque driver with the appropriate hex bit helps maintain consistent clamp load. Follow applicable ASME or equipment manufacturer torque guidelines for size 2 socket cap screws.